Core Specifications
Model: Intel Pentium 4 2.8
Core: Northwood
Operating Frequency: 2.8GHz
FSB: 533MHz
Cache: L1:12-K decoded micro-ops+8KB(data); L2:512K
Voltage: 1.525V
Process: 0.13Micron
Socket: Socket 478

Intel's take:
The Intel® Pentium® 4 processor family supporting Hyper-Threading Technology (HT Technology) delivers Intel's most advanced, most powerful processors for desktop PCs and entry-level workstations, which are based on the Intel NetBurst® microarchitecture. The Pentium 4 processor is designed to deliver performance across applications and usages where end-users can truly appreciate and experience the performance. These applications include Internet audio and streaming video, image processing, video content creation, speech, 3D, CAD, games, multimedia, and multitasking user environments.

Hyper-Threading Technology
Hyper-Threading Technology (HT Technology) is ground breaking technology that changes the landscape of processor design by going beyond GHz to improve processor performance. It allows software programs to "see" two processors and work more efficiently. This new technology enables the processor to execute two series, or threads, of instructions at the same time, thereby improving performance and system responsiveness. The Pentium 4 processor supporting HT Technology is specially designed to deliver immediate increases in performance and system responsiveness with existing applications in multitasking environments (that is, where two or more functions are running at the same time) and with many stand-alone applications today. Furthermore, the Pentium 4 processor supporting HT Technology provides performance headroom for the future.